Historical revisionism involves either the legitimate scholastic re-examination of existing knowledge about a historical event, or the illegitimate distortion of the historical record. For the former, i.e. the academic pursuit, see historical revisionism. This article deals solely with the latter, the distortion of history, which—if it constitutes the denial of historical crimes—is also sometimes called negationism. Notable examples of negationism include Holocaust denial, Armenian Genocide denial and Japanese war crime denial.